Ruby:“意外的keyword_end" ...，但所有打开器和关闭器都匹配 [英] Ruby: "Unexpected keyword_end"... but all openers and closers match

问题描述

我正在处理将向用户返回第n个素数的代码块.我在第19行和第22行遇到了意外的keyword_end"语法错误.我在代码中添加了注释，以便您可以轻松找到错误的位置.

I'm working on a block of code that will return the nth prime to the user. I'm getting "unexpected keyword_end" syntax errors for lines 19 and 22. I put comments in the code so you can find the locations of the errors easily.

def nthPrime(n)
    number = 3
    primeNumber = 1
    i = 0
    primes = [2]
    #Iterates the number until we've found the desired number of primes.
    while primeNumber < n
        #Iterates through the prime numbers already found to locate prime factors.
        while i < primes.length
            #Returns TRUE if a prime factor is found.
            #If no prime factors are found, primeNumber ticks up by one, and the number
            #is added to the list of primes.
            if number % primes[i] != 0
                if i == primes.length
                    primes << number
                    i = 0
                else
                    i ++
                end #Unexpected keyword_end
            end
            number ++
        end #Unexpected keyword_end
    end
    puts number
end

nthPrime(6)

我已经看过许多其他有关意外的keyword_end"错误的Stack Overflow问题，但是所有这些问题都是由于作者的代码中有太多结束"而引起的.我相信，经过多次检查，我的代码中的结束"关闭器数量正确

I've looked at a lot of other Stack Overflow questions about the "unexpected keyword_end" error, but all of those issues were caused because the authors had too many "end"s in their code. I believe, after checking many times, that I have the right number of "end" closers in my code

还有什么问题呢?

推荐答案

将i ++编写为i += 1，将number ++编写为number += 1. Ruby不支持++或--运算符.请阅读在Ruby中没有增量运算符(++)吗?，并阅读为什么Ruby不支持i ++或i—(increment/decrement运算符)?

Write i ++ as i += 1 and number ++ as number += 1. Ruby don't support ++ or -- operators. Read this question No increment operator (++) in Ruby? and also read Why doesn't Ruby support i++ or i— (increment/decrement operators)?

这篇关于Ruby:“意外的keyword_end" ...，但所有打开器和关闭器都匹配的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！